"For the reason as stated under salinity, it is customary to report the density os seawater in equivalent to "grams per litre excess over one kilogram,"designated by the symbol σ. In this notation, the specific gravity of 1.025 is expressed as σ of 25."

"The density of seawater at the surface of the ocean varies from 1,020 to 1,029 kilograms per cubic meter."

1020–1029 kg/m3

The density of an object is the ratio of its mass to its volume. Density can
also be expressed as specific gravity, which is the ratio of the density of a
material to the density of water. Where the density of water in SI units is 1000 kilogram
per cubic meter.

The density of seawater varies with temperature and salinity of the water.
As temperature increases, density decreases. As salinity of the water increasaes,
density also increases. Although the density of seawater varies at different points
in the ocean, a good estimate of its density at the ocean's surface is 1025 kilogram
per cubic meter. Its specific gravity is therefore 1.025.

Edward LaValley -- 2002

Bibliographic Entry

Result(w/surrounding text)

StandardizedResult

Glencoe Earth Science. Ohio: McGraw Hill, 2002: 395.

"Because of salinity and temperature variations, the density of seawater ranges from about 1.02 g/cm3 to 1.03 g/cm3."

"While density of pure water at 4 degrees Celsius is equal to 1, the density of seawater ranges over somewhat higher values, which vary with proximity to shores, rivers, etc., as well as with geographic location & depth. Representative average values are 1.026–1.028,"

1026–1028 kg/m3

Gross, Grant, M. Oceanography 6th edition. Ohio, 1994: 51.

"At 30 degrees Celsius, a change in salinity from 34 0/00 to 35 0/00 changes the density from 1.021 to 1.022."

Since freshwater weighs about 1000 kilograms per cubic meter and seawater weighs about 1.026 times that, we say that the typical seawater density is 1026 kg/m3."

1026 kg/m3

Seawater has been the source of life It is where the first living and
breathing organisms set fins on planet Earth. Most of the Earth's surface,
approximately 70%, is covered with seawater. Scientists believed the Earth has been covered
by water since shortly after the beginning of its existence.

Two of the most important variables in seawater are temperature and salinity
(the concentration of dissolved salts). The two quantities work in conjunction
to control the density of seawater. Since the composition of seawater is affected
mainly by the addition of dissolved salts brought to it by the rivers, volcanic
eruptions, erosion of rocks, and many other ways, the composition differs from
one region to the next.

The physical properties of seawater to be quite different from those of freshwater.
The presence of various salts make seawater undrinkable The total dissolved salts
in seawater are approximately 34.4 g/L, some 300 times that of river water.
The main dissolved constituents in seawater include sodium and chloride. Since
salt ions are heavier than water molecules, seawater is denser than freshwater.
The density of seawater ranges from 1020 to 1030 kg/m3 while the
density of freshwater is about 1000 kg/m3. Variations in salinity
also cause the freezing point of seawater to be somewhat lower than that of freshwater.
(Freshwater freezes at zero degrees Celsius.) Since salt ions interfere with the
formation of hydrogen bonds, seawater does not have a fixed freezing point.

Today, we have inventions that can turn seawater into freshwater, and from
that we can actually drink it without being afraid that we have too much salt
in your body. So drink up (freshwater).